Housed fuse cut-outs



Oct. 16, 1934. A. G. ST EINMAYER HOUSED FUSE CUT-OUTS Filed June 4, 1932 2 Sheets-Sheet l 3maentur fzwmmyaw ZZZ/4. (Ittorneg Oct. 16, 1934. A. 3. STEINMAYER HOUSED FUSE CUT-OUTS Filed June 4. 1932 2 Sheets-Sheet 2 M W8 (Ittorneg Patented Oct. 16, 1934 UNITED STATES PATENT @FFEQE 1,976,812 HOUSED FUSE CUT-OUTS Application June 4, 1932, Serial No. 615,340

8 Claims.

This invention relates to housed fuse cutouts.

In: general, this invention is an improvement over that disclosed in my Patent No. 1,802,450 of April 28, 1931, for Fuse box.

In the customary manner of installing fuse cutouts it is the practice to provide a cutout on each side of the supply transformer and lead the primary conductors from the transformer laterally'to these cutouts. The other side of the .1-0 cutouts are connected to the line wires and it is the customary practice to provide dead end insulators adjacent the fuse cutouts to which the line conductors are attached.

This invention is designed to provide a novel form of fuse cutout in which the necessity of using a dead end insulator is avoided, and instead the fuse cutout itself is providedwith dead end eyelets or attaching members integral with the porcelain of the fuse box itself, so that there is a saving in the equipment required for the installation of these fuse cutouts, while at the same time the terminal members within the cutouts are not subjected to any strain whatsoever as the mechanical strain from the line conductors is directly borne by the eyelets or attaching members for the line conductors.

Further objects are to provide a construction in which rain shields integral with the porcelain fuse box are provided which cooperate with the vention to provide additional protection against leakage and also to afford mechanical strength for the eyelets or attaching members, which, in certain forms of the invention, may merge into or be formed as a portion of the rain shields themselves.

Further objects are to provide a construction in which although the line wires are attached to an integral portion of the fuse box itself, that nevertheless a great leakage distance is provided so that there is no decrease in the insulating characteristics and in protection against flashover, but in which a high insulation and a large leakage distance is provided, although the line wires themselves are directly. attached to the box, no additional metal being necessitated by the construction.

Embodiments of the invention are shown in the accompanying drawings, in which:

Figure 1 is a face view of a fuse box, showing one form of the invention, certain portions of the structure being broken away and in section.

Figure 2 is a side View of the structure shown in Figure 1, with parts broken away.

attaching members in certain forms of the inintegralwith the porcelain body portion 1.

Figure 3 is a top view of the structure shown in Figure 1.

Figure 4 shows the upper end of a fuse cutout with. the cover removed, showing a further form of the invention.

Figure 5 is a sectional view on the line 5--5 of Figure 4.

Figure 6 is a view corresponding to Figure 4, showing a still further form of the invention.

Figure 7 isa sectional view on the line l'7 of Figure 6.

Referring to Figures 1, 2 and 3 of the drawings, it will be seen that the fuse cutout comprises a fuse box or body portion 1 formed of porcelain and provided with a hinged cover 2 which removably carries the fuse 3. This construction may be of any desired type, for example similar to that shown in my co-pending application Serial No. 541,313, filed June 1, 1931, for Fuses.

The stationary contacts are carried within the body portion or fuse box 1 and are indicated by the reference characters 4 and 5 and are adapted to engage the contacts of the fuse in the usual manner. The stationary contacts are provided with. terminal members 6 and '7 respectively to which the conductors 8 and 9 are attached, the conductor 9' in the usual installations extending to the transformer, and the conductor 8 extending to the line wire.

The conductor 8 Wl11 hereinafter be referred to as the line conductor, although obviously the fuse cutout can be used in other installations and it is: not intended that the use of this expression be interpreted as limiting in any sense.

The fuse box is attached to a support by means of bolts or other attaching means 10 secured thereto.

The fuse box is provided with apertures 11 for the conductor 9, such apertures being located on opposite sides and in each instance being provided with rain shields or insulating webs 12 At the upper end, the fuse box is provided with apertures 13 on opposite sides through either of which. the conductor 8 may extend. Rain shields or webs 14 surround or hood these apertures and are formed integrally with the porcelain body portion.

Inithe form of the invention shown in Figures 1, 2 and 3, an attaching member for the line 0011- ductor is provided in the form of an eyelet 15 adjacent the upper front portion of the fuse box and integral with the porcelain body portion thereof. In addition an extra web or petticoat 16 is formed integrally with the porcelain body por-- tion and is located in a position to interrupt the surface from the eyelet 15 to the attaching means 10. For example as shown in Figures 1 to 3, the insulating shield or petticoat 16 projects upwardly adjacent the rear upper portion of the box and extends downwardly a material distance along the sides of the box. If desired, this shield or petticoat 16 may merge into the rear portion of the rain shields and thereby secure additional mechanical strength for the construction as shown in Figures 1 and 3.

As shown in Figures 1 and 2, the line conductor extends downwardly and outwardly through one of the apertures 13, is looped back free from contact with the rain shield, passes through the eyelet 15 and extends upwardly to the line conductors. It is twisted or looked upon itself adjacent the eyelet 15, so that all mechanical strain from the line conductor is borne by the eyelet and is not transmitted to the terminal member 6. This protection against strain transmitted to the terminal member is secured without the use of an'auxiliary dead end insulator, as has heretofore been the practice. It is, therefore, not necessary for the lineman to carry the additional equipment required in the old practice, the fuse box itself furnishing all of the necessary equipment for this type of installation.

Referring to Figures 4 and 5 wherein another form of the invention is shown, it will be seen that the upper rain shields 14 have eyelets 18 formed integrally therewith and located on the forward portions of the rain shields. This construction also utilizes the rain shields as means for enhancing or increasing the strength of the integral attaching means or line conductor eyelets 18.

In addition to the above enumerated characteristics it is to be noted that the integral eyelets are located adjacent the front portion of the box and that protection is'afforded against surface leakage by the rain shields themselves so that the leakage path from the point of attachment of the line conductors to the supports for the fuse box is also very great in this construction.

In the form of the invention shown in Figures 6 and 7 the same idea is followed, but instead of eyelets, pins 19 integral with the forward portion of the rain shields and with the fuse box body are provided and form the attaching means for the line conductors. These pins are provided with'enlarged outer ends or heads 20 so that the line conductor may be wrapped around the pins and tied or wrapped upon itself, as previously described, and thus a very secure attachment of the line conductor may be secured.

The leakage path from the pins or point of attachment of the line conductor to the support for the fuse box is also very great in this construction and is enhanced by the petticoats or rain shields.

It is to be distinctly understood that any feature of any one of the forms of the-invention illustrated may be employed with any of the features of other of the forms of the invention without departing from the spirit of this invention. For example, it is to be distinctly understood that the extra petticoat or web 16 shown in Figures 1, 2 and 3 may be employed with either of the other forms of the invention, or other changes of this type may be made.

It will be seen that a novel form of fuse box has been provided by this invention which dispenses with the use of an extra dead end insulator, as has heretofore been employed, but which instead provides a fuse box formed of insulating material, such as porcelain, in which attaching means for the line conductors, or line conductor anchoring means, is provided integral with the insulating body portion of the fuse box itself so that the mechanical strain from the line conductors is borne directly by a portion of the fuse box integral with the body portion. This construction, therefore, does not introduce any extra metal and does not increase the chance of leakage or fiashover, but instead provides a simple and easily produced type of construction in which the attaching means is formed integral with the porcelain body portion itself and receives the line conductors, and in which there is no sacrifice whatsoever of leakage distance or insulating characteristics of the box.

Although this invention has been described in considerable detail, it is to be understood that such description is intended as illustrative rather than limiting, as the invention may be variously embodied and is to be interpreted as claimed.

I claim:

1. A fuse box construction comprising a body portion, a cover therefor, a fuse and terminals located within said body portion, said body portion being formed of insulating material and having apertures adjacent said terminals, supporting means for said body portion, projecting fins integral with said body portion and located between said apertures and said supporting means, and a securing means for a line wire formed integrally with said body portion and spaced from said supporting means by said fins, whereby surface leakage from the line wire to the supporting means is reduced.

2. In a device of the class described, a housing formed of insulating material, supporting means attached to the rear of said housing, dead ending means formed integrally with said housing and projecting upwardly from the top of said housing adjacent the front thereof, and a web formed integrally with said housing and projecting upwardly from the top thereof rearwardly of said dead ending means.

3. A porcelain housing for a cutout fuse comprising a hollow body portion having side walls at least one of which is provided with an aperture, a rain shield integral with said body portion and shielding said aperture, 2. dead ending eyelet integral with said body portion and projecting upwardly from the top thereof, and a web integral with said body portion and projecting upwardly from the top thereof rearwardly of said dead ending eyelet.

4. A porcelain housing for a cutout fuse comprising a hollow body portion having side walls at least one of which is provided with an aperture, a rain shield integral with said body portion and shielding said aperture, a dead ending eyelet integral with said body portion and projecting upwardly from the top thereof, and a web integral with said body portion and projecting upwardly from the top thereof rearwardly of said dead ending eyelet, said web having side portions extending down the sides of said body portion.

5. A housing of the class described, comprising a body portion formed of insulating material and having a side wall provided with an aperture through which a wire may project, a rain shield forming a hood for said aperture and projecting outwardly from said side wall and formed integrally with said housing,'and a dead ending means for the wire formed integrally with said rain shield.

6. A housing of the class described, comprising a body portion formed of insulating material and having a side wall provided with an aperture through which a wire may project, a rain shield forming a hood for said aperture and projecting outwardly from said side wall and formed integrally with said housing, and a dead ending eyelet for the wire formed integrally with said rain shield and projecting outwardly from said rain shield.

'7. A housing of the class described, comprising a body portion of insulating material having a side wall provided with a wire outlet aperture, a rain shield forming a housing for said aperture and integral with said body portion and projecting laterally from said side wall, and a headed pin integral with said body portion and projecting outwardly therefrom and constituting wire dead ending means.

8. In a device of the class described, a housing formed of insulating material, supporting means for said housing, said housing having side walls at least one of which is provided with an aperture through which a line wire may pass, a dead ending means for the line wire formed integrally with said housing, and a laterally projecting web interposed between said dead ending means and supporting means, whereby surface leakage to said supporting means is reduced, and whereby the line wire may pass directly from said dead ending means through said aperture.

ALWIN G. STEINMAYER. 

